1669042141 has 12 divisors (see below), whose sum is σ = 1808873748. Its totient is φ = 1539318144.

The previous prime is 1669042129. The next prime is 1669042153. The reversal of 1669042141 is 1412409661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1669042129) and next prime (1669042153).

It can be written as a sum of positive squares in 6 ways, for example, as 164378041 + 1504664100 = 12821^2 + 38790^2 .

It is not a de Polignac number, because 1669042141 - 2⁹ = 1669041629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1669042097 and 1669042106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669042241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228441 + ... + 235633.

It is an arithmetic number, because the mean of its divisors is an integer number (150739479).

Almost surely, 2^1669042141 is an apocalyptic number.

It is an amenable number.

1669042141 is a deficient number, since it is larger than the sum of its proper divisors (139831607).

1669042141 is a wasteful number, since it uses less digits than its factorization.

1669042141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8592 (or 8579 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1669042141 is about 40853.9121872067. The cubic root of 1669042141 is about 1186.1941213436.

The spelling of 1669042141 in words is "one billion, six hundred sixty-nine million, forty-two thousand, one hundred forty-one".